#include <iostream>
#include <cmath>
using namespace std;
 
int main()
{
	double a;
	char b;
	cin >> a >> b;
	int ret = 0;
	if (a <= 1)
	{
		ret += 20;
	}
	else
	{
		ret += 20;
		a -= 1;
		ret += ceil(a);
	}
	if (b == 'y')
	{
		ret += 5;
	}
	cout << ret << endl;
	return 0;
}